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  2. Deletion (genetics) - Wikipedia

    en.wikipedia.org/wiki/Deletion_(genetics)

    Deletion on a chromosome. In genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) (sign: Δ) is a mutation (a genetic aberration) in which a part of a chromosome or a sequence of DNA is left out during DNA replication.

  3. Deletion mapping - Wikipedia

    en.wikipedia.org/wiki/Deletion_mapping

    In genetics and especially genetic engineering, deletion mapping is a technique used to find out the mutation sites within a gene. The principle of deletion mapping involves crossing a strain which has a point mutation in a gene, with multiple strains who each carry a deletion in a different region of the same gene.

  4. Luria–Delbrück experiment - Wikipedia

    en.wikipedia.org/wiki/Luria–Delbrück_experiment

    The Luria–Delbrück experiment (1943) (also called the Fluctuation Test) demonstrated that in bacteria, genetic mutations arise in the absence of selective pressure rather than being a response to it. Thus, it concluded Darwin's theory of natural selection acting on random mutations applies to bacteria as well as to more complex organisms.

  5. Mutagenesis (molecular biology technique) - Wikipedia

    en.wikipedia.org/wiki/Mutagenesis_(molecular...

    Types of mutations that can be introduced by random, site-directed, combinatorial, or insertional mutagenesis. In molecular biology, mutagenesis is an important laboratory technique whereby DNA mutations are deliberately engineered to produce libraries of mutant genes, proteins, strains of bacteria, or other genetically modified organisms.

  6. Modifications (genetics) - Wikipedia

    en.wikipedia.org/wiki/Modifications_(genetics)

    There are several methods, or forms, of mutation that exist including spontaneous mutation, errors during replication and repair, as well as mutation due to environmental effects. [8] These origins of mutations can cause many different types of mutations which influence gene expression on both large and small scales.

  7. Site-directed mutagenesis - Wikipedia

    en.wikipedia.org/wiki/Site-directed_mutagenesis

    The simplest method places the mutation site toward one of the ends of the fragment whereby one of two oligonucleotides used for generating the fragment contains the mutation. This involves a single step of PCR, but still has the inherent problem of requiring a suitable restriction site near the mutation site unless a very long primer is used.

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  9. Nonsynonymous substitution - Wikipedia

    en.wikipedia.org/wiki/Nonsynonymous_substitution

    A nonsynonymous substitution is a nucleotide mutation that alters the amino acid sequence of a protein. Nonsynonymous substitutions differ from synonymous substitutions , which do not alter amino acid sequences and are (sometimes) silent mutations .

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